20 févr. 150 av. J.-C. - SMOKE SIGNAL
Description:
The earliest form of long distance communication. Greek historian, Polybius, developed a system of alphabetical smoke signals by holding sets of torches in pairs.Ajouté au bande de temps:
Date:
20 févr. 150 av. J.-C.
Maintenaint
~ Il y a 2176 ans